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Post by aj czarkowski on Sept 21, 2012 18:10:36 GMT -5
I've been having some problems with my Kar98's accuracy. It shoots REALLY high. Not so much right or left (although it does that too) it shoots so high I actually would need to aim at the knees to hit a target in the chest.
Because this rifle was a custom job done by me, I thought I screwed the barrel up somehow (I heard alot of the Bar10/VSR11s had warped barrels) but everything checked out fine. So could it be the hop up? I've set it to the lowest setting and it's still shooting high above target.
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Post by newcomer on Sept 21, 2012 18:25:39 GMT -5
perhaps the nub is stuck? ive found that if the fit isn't correct, the nub can get jammed in the barrel where the hop up unit is located.
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ScottCollins
Private 1st Class
A people that values its privileges above its principles soon loses both.
Posts: 548 
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Post by ScottCollins on Sept 21, 2012 18:30:37 GMT -5
Haha, I had this problem a few weeks ago with mine, brand new and everything. I went to take it apart and I couldn't find anything too wrong with it except for the bad gearbox so I put it back together and it shoots perfect! Maybe my barrel was just a little bit off kilter or something.
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Post by aj czarkowski on Sept 21, 2012 18:40:07 GMT -5
Hmm... Well, I did check it again just for the hell of it. I've taken it apart plenty of times, and I built it around a year ago. But I'm thinking about that hop up nub so maybe I'll take a look at it.
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Sgt_Tom
Technical Sgt.
Combat!
Posts: 3,580
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Post by Sgt_Tom on Sept 21, 2012 20:01:49 GMT -5
Yea sounds like the hop up nub. Try taking apart the hop up and reassemble it.
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ob
Private
Posts: 61
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Post by ob on Sept 22, 2012 6:58:58 GMT -5
That's what happened to me, you'll have to pull the hopup back to you if that's the problem.
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2nd Bat
Master sergeant
Posts: 11,813
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Post by 2nd Bat on Sept 22, 2012 10:00:05 GMT -5
Defintely your hop up and if you keep firing it in the full on adjusted state it will wear out quickly and cease working altogether.
you definitely want to get that squared away. It is sometimes a little tricky with these conversions to insure the barrels are aligned once everything is modified but based on what your describing it sounds like the hop up nub is stuck in place.
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Post by aj czarkowski on Sept 22, 2012 12:37:14 GMT -5
Alright, I'm going to take it apart and check if it's stuck. I'm guessing this happens when it is on the highest setting, then it gets stuck when it is lowered?
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Post by aj czarkowski on Sept 22, 2012 17:54:38 GMT -5
Well I moved it back so it's completely off, and noticed that the small bar attached to the arm, which moves the nub, is broken in half. So somehow it was still set?
Looks like we got a real Scooby Dooer on our hands
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Post by jimmiroquai on Sept 23, 2012 9:41:55 GMT -5
Wait, do you aim through a scope or down the iron sights? If you are using a converted Bar10/dboys hybrid, and aiming down the iron sights, you will ALWAYS shoot high because the rear sight sits higher than it's supposed to in our Bar10 conversions. If you are using a scope, then you may just need to zero the scope. If your hop arm is broken, then your hop is most probably already "off" and therefore not the problem.
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Post by aj czarkowski on Sept 23, 2012 11:24:16 GMT -5
Then I guess that's problem solved, took me an hour to reassemble the hopup and I didn't even need to. I always wondered if keeping the rear sight sitting so high would effect the aim, but I figured lowering the hopup would fix that.
Thanks for your help guys
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Post by jimmiroquai on Sept 23, 2012 17:38:59 GMT -5
That's why i have no choice but to use a scope with my bar10 conversions. It's the only way to compensate for the higher position of the rear sights in these conversions. If i want to use a kar98k without a scope, i'll use my G&G. But for precision shooting, I'll use my bar10 conversion with a scope.
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cairo1
Private 1st Class
Posts: 494
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Post by cairo1 on Sept 25, 2012 12:44:29 GMT -5
how is your rear sight setup? lowering it will likely yield results. Alternatively, use Jbweld and add to the front sight a little, i did bot h of these things and my K98 is spot on.
every so ofter i use a tanaka, and they are just not as good as either my K98 or a bar 10 i have waiting to be converted.
I chopped off the round bracket and built my own ramps and base, this let me get it much closer to the rifle providing better BB placement.
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Post by jimmiroquai on Sept 25, 2012 22:51:38 GMT -5
Yes, you would have to do both. Thing with the bar10 conversions, the outer bull barrel of the bar10 just sits way too high even if you make the thinnest/smallest sightbox possible for the rear sight. So you will have to raise the front sight blade as well. A laser bore sighter would be an immense help. Or just mount a scope. Will have a Tanaka K98 by next week so i can do the ultimate Tanaka vs G&G vs upgraded Bar98k comparison.
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Post by aj czarkowski on Sept 26, 2012 19:30:22 GMT -5
Over the last week I fixed up my kar98k alot, because it looked horrible. As of now the only major problem is the sights, so I'm going to try to lower the rear sight as much as possible. I know it still won't be a crack shot but atleast it won't shoot as high.
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Post by aj czarkowski on Sept 28, 2012 19:21:38 GMT -5
About halfway done with the sights, I put on the original Bar10 sight back on untill I finish. I'm going to try to get the Kar98k sight to the same level as the original Bar10, so it's going to take ALOT of sawing and sanding. Right now I just about have it cut out, then I need to sand it down.
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Post by jimmiroquai on Sept 28, 2012 23:07:19 GMT -5
Don't forget to add to the front sight blade as well.
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cairo1
Private 1st Class
Posts: 494
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Post by cairo1 on Sept 29, 2012 2:23:18 GMT -5
have a grinding wheel?
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Post by aj czarkowski on Sept 29, 2012 12:52:21 GMT -5
I have the front sight blade leveled, just need to lower the rear sight the same. I don't have a grinding wheel, so it's taking a while
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Post by jimmiroquai on Sept 29, 2012 20:52:56 GMT -5
What did you do to raise the front sight? You could also forgo the rear sight box completely and just make your own. That's what i did with one of my conversions. I just used the metal leaf sight and made a sight box out of pvc board. It will still sit to high, no matter how low you get it, that's why you have to raise the front sight blade as well.
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Post by aj czarkowski on Sept 30, 2012 9:43:49 GMT -5
I also made my own sight box, and I raised the front sight with JB weld
Now I just need to put the rear sight back on
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Post by aj czarkowski on Oct 2, 2012 21:21:14 GMT -5
Everything is just about finished, all I need to do is wait for the jb weld to dry. I lowered the sight enough so it is spot on with the original bar10 one, so it should should more accurate.
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cairo1
Private 1st Class
Posts: 494
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Post by cairo1 on Oct 4, 2012 0:59:20 GMT -5
Get some pictures up son!
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Post by aj czarkowski on Oct 4, 2012 14:54:18 GMT -5
I ran out of JB weld, and appearently what I put on wasn't enough and the sight fell off. Now I need to get more  |
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2nd Bat
Master sergeant
Posts: 11,813
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Post by 2nd Bat on Oct 4, 2012 16:54:26 GMT -5
Usually when JB weld fails it is because the surfaces are oily or not clean. The second most common cause is they havent been mixed thoroughly and it the proper proportions of weld and hardner. The final issue is allowing it to set at room temperature.
When used properly its pretty effective stuff. this from a guy who has definitely applied it improperly! Incidently it also helps to gouge up the surfaces as well since the JB weld oozes into these crevices and bonds stronger.
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Post by aj czarkowski on Oct 12, 2012 14:04:21 GMT -5
I got more JB weld from home depot. I ran out last time and couldn't put enough on so it broke again
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Post by aj czarkowski on Oct 12, 2012 14:07:59 GMT -5
They should use JB weld as toothpaste, if someone has cavities it will bond the teeth back together   |
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Post by brownien on Oct 12, 2012 14:44:52 GMT -5
Whats that raised block right in front of the siver bolt area?
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Post by aj czarkowski on Oct 12, 2012 15:18:17 GMT -5
That's the original bar10 sight. I had to put in back on in order to sight in the sight
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Post by brownien on Oct 12, 2012 21:48:13 GMT -5
So you used the sight to sight in the sight? that outa sight! ;D lol I keel Me!
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